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entries not openRunaway Adventures Ltd
Chiltern Ridge Winter 50K
Next edition: Saturday, 30 October 2027Berkhamsted Cricket Club, England
A fully marked 50K loop from Berkhamsted through the Chiltern Hills, with about 800 metres of climbing. Four support points and a nine-hour limit make this a well-supported winter trail ultra.
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Distance31.1 mi
Ascent800m*
Climb / km16m
Cutoff9h
Cutoff pace10:48/km
TechnicalityUnknown
EntryFrom £65
FormatLooped
Next edition
30 October 2027
This is the most relevant confirmed edition currently held for the permanent race family. Edition-specific facts should still be checked against the final organiser instructions.
Edition archive
Expand an edition to inspect its year-specific facts. Other years never replace the primary edition facts.
Past editions
2026Past edition
These facts belong to the 2026 edition only. Missing values have not been copied from another year.
- Distance
- 50 km
- Ascent
- 800m
- Cutoff
- 9h
- Entry
- £75
- Format
- continuous · single stage · looped
- Stage layout
- Not applicable
Successful source check: 4 Sept 2026Source confidence: highField-scoped check 2026-11-06: The organiser publishes results for the completed 31 October 2026 edition. Its history remains separate from the newly announced 2027 edition. Other facts retain earlier verification dates.
Check Chiltern Ridge Winter 50K 2026 source (opens in a new tab)
Race For You difficulty
3.7/ 10
Moderate
Moderate input evidence · 56% evidence coverage
The main recorded demands are balanced overall demands. Course difficulty and cutoff pressure describe different challenges: more approachable terrain can still require a demanding pace to beat the deadline. Neither score assesses your personal fitness, safety or readiness.
Scoring details and version
Difficulty V2's separate time-limit modifier adds 0.35 points here and is capped at 0.70; a broad limit cannot erase extreme intrinsic demand. This is independent of the public Cutoff Pressure V2 band. Evidence coverage describes the recorded inputs, not prediction accuracy or your likelihood of finishing.
Weather, conditions and individual preparation can change the real difficulty significantly.
How the score works Distance, weighted 30 percent3 out of 10
Climbing, weighted 25 percent2.6 out of 10
Technicality, weighted 15 percent5.5 out of 10
Accumulated burden, weighted 17 percent1.9 out of 10
Exposure & support, weighted 13 percent4.7 out of 10
Course analysis
What shapes this race
Expect forest trail that may change character in wet conditions.
trailforestmixed
Climbing density
16m per km
A more useful comparison than total ascent alone: it shows how consistently the course asks you to climb.
Cutoff analysis
High pressure
To finish inside 9h, the raw average required is 10:48 per kilometre (17:22 per mile), including every stop.
Raw pace10:48/km
PressureHigh pressure
Cutoff pressure compares the published time limit with distance, ascent and verified course demands. Lower pressure does not mean the race is easy. Raw pace includes checkpoints, food stops, navigation errors and any sleep; it is not a pacing plan.
Who this suits
First ultra?
There is not enough verified information to assess first-ultra suitability yet.
Navigation
fully marked
The route is described as marked, but runners should still read the final race instructions.
Exposure & kit
unknown kit
Night-running exposure has not been verified for this edition. Check the organiser’s latest schedule, route information and final kit rules.
Personal race predictor
Will you make the cutoff?
Use a previous result to estimate a realistic range for Chiltern Ridge Winter 50K, your potential buffer and the biggest change in demand.
Practical detail
Support & logistics
StartBerkhamsted Cricket Club
FinishBerkhamsted Cricket Club
Support levelunknown
Logistics are only shown where currently recorded. Confirm parking, transport, crew access and final aid-station plans with the organiser.
Latest verification
Trust the source, see the gaps.
Data PartialNew 2027 edition: organiser confirms 30 October, 50km, 800m+, nine hours, fully marked single-loop route at Berkhamsted Cricket Club and 350 places. Entries open 12 December 2026 at 10:00 Europe/London. First 50 places £65 affiliated / £67 unaffiliated; later tiers rise. Unverified 2027 logistics remain unknown.
- Successful source check
- 6 Nov 2026
- Catalogue record updated
- 6 Nov 2026
- Official source
- Available
Elevation is approximate or awaiting final confirmation.
Event details can change after a successful source check. Confirm the final route, kit, cutoff, price and entry terms directly with the organiser before entering or travelling.
Found something wrong?
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Wrong cutoff? Date changed? New course? Tell us what moved and include the official source if you have it.
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